diff options
Diffstat (limited to 'target/linux/sunxi/files/drivers/mmc/host/sunxi-mci.c')
| -rw-r--r-- | target/linux/sunxi/files/drivers/mmc/host/sunxi-mci.c | 908 |
1 files changed, 0 insertions, 908 deletions
diff --git a/target/linux/sunxi/files/drivers/mmc/host/sunxi-mci.c b/target/linux/sunxi/files/drivers/mmc/host/sunxi-mci.c deleted file mode 100644 index e091ebb877..0000000000 --- a/target/linux/sunxi/files/drivers/mmc/host/sunxi-mci.c +++ /dev/null @@ -1,908 +0,0 @@ -/* - * Driver for sunxi SD/MMC host controllers - * (C) Copyright 2007-2011 Reuuimlla Technology Co., Ltd. - * (C) Copyright 2007-2011 Aaron Maoye <leafy.myeh@reuuimllatech.com> - * (C) Copyright 2013-2013 O2S GmbH <www.o2s.ch> - * (C) Copyright 2013-2013 David Lanzendörfer <david.lanzendoerfer@o2s.ch> - * (C) Copyright 2013-2013 Hans de Goede <hdegoede@redhat.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/io.h> -#include <linux/device.h> -#include <linux/interrupt.h> -#include <linux/delay.h> -#include <linux/err.h> - -#include <linux/clk.h> -#include <linux/clk-private.h> -#include <linux/clk/sunxi.h> - -#include <linux/gpio.h> -#include <linux/platform_device.h> -#include <linux/spinlock.h> -#include <linux/scatterlist.h> -#include <linux/dma-mapping.h> -#include <linux/slab.h> -#include <linux/regulator/consumer.h> - -#include <linux/of_address.h> -#include <linux/of_gpio.h> -#include <linux/of_platform.h> - -#include <linux/mmc/host.h> -#include <linux/mmc/sd.h> -#include <linux/mmc/mmc.h> -#include <linux/mmc/core.h> -#include <linux/mmc/card.h> - -#include "sunxi-mci.h" - -static void sunxi_mmc_init_host(struct mmc_host *mmc) -{ - u32 rval; - struct sunxi_mmc_host *smc_host = mmc_priv(mmc); - - /* reset controller */ - rval = mci_readl(smc_host, REG_GCTRL) | SDXC_HWReset; - mci_writel(smc_host, REG_GCTRL, rval); - - mci_writel(smc_host, REG_FTRGL, 0x20070008); - mci_writel(smc_host, REG_TMOUT, 0xffffffff); - mci_writel(smc_host, REG_IMASK, smc_host->sdio_imask); - mci_writel(smc_host, REG_RINTR, 0xffffffff); - mci_writel(smc_host, REG_DBGC, 0xdeb); - mci_writel(smc_host, REG_FUNS, 0xceaa0000); - mci_writel(smc_host, REG_DLBA, smc_host->sg_dma); - rval = mci_readl(smc_host, REG_GCTRL)|SDXC_INTEnb; - rval &= ~SDXC_AccessDoneDirect; - mci_writel(smc_host, REG_GCTRL, rval); -} - -static void sunxi_mmc_exit_host(struct sunxi_mmc_host *smc_host) -{ - mci_writel(smc_host, REG_GCTRL, SDXC_HWReset); -} - -/* /\* UHS-I Operation Modes */ -/* * DS 25MHz 12.5MB/s 3.3V */ -/* * HS 50MHz 25MB/s 3.3V */ -/* * SDR12 25MHz 12.5MB/s 1.8V */ -/* * SDR25 50MHz 25MB/s 1.8V */ -/* * SDR50 100MHz 50MB/s 1.8V */ -/* * SDR104 208MHz 104MB/s 1.8V */ -/* * DDR50 50MHz 50MB/s 1.8V */ -/* * MMC Operation Modes */ -/* * DS 26MHz 26MB/s 3/1.8/1.2V */ -/* * HS 52MHz 52MB/s 3/1.8/1.2V */ -/* * HSDDR 52MHz 104MB/s 3/1.8/1.2V */ -/* * HS200 200MHz 200MB/s 1.8/1.2V */ -/* * */ -/* * Spec. Timing */ -/* * SD3.0 */ -/* * Fcclk Tcclk Fsclk Tsclk Tis Tih odly RTis RTih */ -/* * 400K 2.5us 24M 41ns 5ns 5ns 1 2209ns 41ns */ -/* * 25M 40ns 600M 1.67ns 5ns 5ns 3 14.99ns 5.01ns */ -/* * 50M 20ns 600M 1.67ns 6ns 2ns 3 14.99ns 5.01ns */ -/* * 50MDDR 20ns 600M 1.67ns 6ns 0.8ns 2 6.67ns 3.33ns */ -/* * 104M 9.6ns 600M 1.67ns 3ns 0.8ns 1 7.93ns 1.67ns */ -/* * 208M 4.8ns 600M 1.67ns 1.4ns 0.8ns 1 3.33ns 1.67ns */ - -/* * 25M 40ns 300M 3.33ns 5ns 5ns 2 13.34ns 6.66ns */ -/* * 50M 20ns 300M 3.33ns 6ns 2ns 2 13.34ns 6.66ns */ -/* * 50MDDR 20ns 300M 3.33ns 6ns 0.8ns 1 6.67ns 3.33ns */ -/* * 104M 9.6ns 300M 3.33ns 3ns 0.8ns 0 7.93ns 1.67ns */ -/* * 208M 4.8ns 300M 3.33ns 1.4ns 0.8ns 0 3.13ns 1.67ns */ - -/* * eMMC4.5 */ -/* * 400K 2.5us 24M 41ns 3ns 3ns 1 2209ns 41ns */ -/* * 25M 40ns 600M 1.67ns 3ns 3ns 3 14.99ns 5.01ns */ -/* * 50M 20ns 600M 1.67ns 3ns 3ns 3 14.99ns 5.01ns */ -/* * 50MDDR 20ns 600M 1.67ns 2.5ns 2.5ns 2 6.67ns 3.33ns */ -/* * 200M 5ns 600M 1.67ns 1.4ns 0.8ns 1 3.33ns 1.67ns */ -/* *\/ */ - -static void sunxi_mmc_init_idma_des(struct sunxi_mmc_host *host, - struct mmc_data *data) -{ - struct sunxi_idma_des *pdes = (struct sunxi_idma_des *)host->sg_cpu; - struct sunxi_idma_des *pdes_pa = (struct sunxi_idma_des *)host->sg_dma; - int i, max_len = (1 << host->idma_des_size_bits); - - for (i = 0; i < data->sg_len; i++) { - pdes[i].config = SDXC_IDMAC_DES0_CH | SDXC_IDMAC_DES0_OWN | - SDXC_IDMAC_DES0_DIC; - - if (data->sg[i].length == max_len) - pdes[i].buf_size = 0; /* 0 == max_len */ - else - pdes[i].buf_size = data->sg[i].length; - - pdes[i].buf_addr_ptr1 = sg_dma_address(&data->sg[i]); - pdes[i].buf_addr_ptr2 = (u32)&pdes_pa[i + 1]; - } - pdes[0].config |= SDXC_IDMAC_DES0_FD; - pdes[i - 1].config = SDXC_IDMAC_DES0_OWN | SDXC_IDMAC_DES0_LD; - - wmb(); /* Ensure idma_des hit main mem before we start the idmac */ -} - -static enum dma_data_direction sunxi_mmc_get_dma_dir(struct mmc_data *data) -{ - if (data->flags & MMC_DATA_WRITE) - return DMA_TO_DEVICE; - else - return DMA_FROM_DEVICE; -} - -static int sunxi_mmc_prepare_dma(struct sunxi_mmc_host *smc_host, - struct mmc_data *data) -{ - u32 dma_len; - u32 i; - u32 temp; - struct scatterlist *sg; - - dma_len = dma_map_sg(mmc_dev(smc_host->mmc), data->sg, data->sg_len, - sunxi_mmc_get_dma_dir(data)); - if (dma_len == 0) { - dev_err(mmc_dev(smc_host->mmc), "dma_map_sg failed\n"); - return -ENOMEM; - } - - for_each_sg(data->sg, sg, data->sg_len, i) { - if (sg->offset & 3 || sg->length & 3) { - dev_err(mmc_dev(smc_host->mmc), - "unaligned scatterlist: os %x length %d\n", - sg->offset, sg->length); - return -EINVAL; - } - } - - sunxi_mmc_init_idma_des(smc_host, data); - - temp = mci_readl(smc_host, REG_GCTRL); - temp |= SDXC_DMAEnb; - mci_writel(smc_host, REG_GCTRL, temp); - temp |= SDXC_DMAReset; - mci_writel(smc_host, REG_GCTRL, temp); - - mci_writel(smc_host, REG_DMAC, SDXC_IDMACSoftRST); - - if (!(data->flags & MMC_DATA_WRITE)) - mci_writel(smc_host, REG_IDIE, SDXC_IDMACReceiveInt); - - mci_writel(smc_host, REG_DMAC, SDXC_IDMACFixBurst | SDXC_IDMACIDMAOn); - - return 0; -} - -static void sunxi_mmc_send_manual_stop(struct sunxi_mmc_host *host, - struct mmc_request *req) -{ - u32 cmd_val = SDXC_Start | SDXC_RspExp | SDXC_StopAbortCMD - | SDXC_CheckRspCRC | MMC_STOP_TRANSMISSION; - u32 ri = 0; - unsigned long expire = jiffies + msecs_to_jiffies(1000); - - mci_writel(host, REG_CARG, 0); - mci_writel(host, REG_CMDR, cmd_val); - do { - ri = mci_readl(host, REG_RINTR); - } while (!(ri & (SDXC_CmdDone | SDXC_IntErrBit)) && - time_before(jiffies, expire)); - - if (ri & SDXC_IntErrBit) { - dev_err(mmc_dev(host->mmc), "send stop command failed\n"); - if (req->stop) - req->stop->resp[0] = -ETIMEDOUT; - } else { - if (req->stop) - req->stop->resp[0] = mci_readl(host, REG_RESP0); - } - - mci_writel(host, REG_RINTR, 0xffff); -} - -static void sunxi_mmc_dump_errinfo(struct sunxi_mmc_host *smc_host) -{ - struct mmc_command *cmd = smc_host->mrq->cmd; - struct mmc_data *data = smc_host->mrq->data; - - /* For some cmds timeout is normal with sd/mmc cards */ - if ((smc_host->int_sum & SDXC_IntErrBit) == SDXC_RespTimeout && - (cmd->opcode == 5 || cmd->opcode == 52)) - return; - - dev_err(mmc_dev(smc_host->mmc), - "smc %d err, cmd %d,%s%s%s%s%s%s%s%s%s%s !!\n", - smc_host->mmc->index, cmd->opcode, - data ? (data->flags & MMC_DATA_WRITE ? " WR" : " RD") : "", - smc_host->int_sum & SDXC_RespErr ? " RE" : "", - smc_host->int_sum & SDXC_RespCRCErr ? " RCE" : "", - smc_host->int_sum & SDXC_DataCRCErr ? " DCE" : "", - smc_host->int_sum & SDXC_RespTimeout ? " RTO" : "", - smc_host->int_sum & SDXC_DataTimeout ? " DTO" : "", - smc_host->int_sum & SDXC_FIFORunErr ? " FE" : "", - smc_host->int_sum & SDXC_HardWLocked ? " HL" : "", - smc_host->int_sum & SDXC_StartBitErr ? " SBE" : "", - smc_host->int_sum & SDXC_EndBitErr ? " EBE" : "" - ); -} - -static void sunxi_mmc_finalize_request(struct sunxi_mmc_host *host) -{ - struct mmc_request *mrq; - unsigned long iflags; - - spin_lock_irqsave(&host->lock, iflags); - - mrq = host->mrq; - if (!mrq) { - spin_unlock_irqrestore(&host->lock, iflags); - dev_err(mmc_dev(host->mmc), "no request to finalize\n"); - return; - } - - if (host->int_sum & SDXC_IntErrBit) { - sunxi_mmc_dump_errinfo(host); - mrq->cmd->error = -ETIMEDOUT; - if (mrq->data) - mrq->data->error = -ETIMEDOUT; - if (mrq->stop) - mrq->stop->error = -ETIMEDOUT; - } else { - if (mrq->cmd->flags & MMC_RSP_136) { - mrq->cmd->resp[0] = mci_readl(host, REG_RESP3); - mrq->cmd->resp[1] = mci_readl(host, REG_RESP2); - mrq->cmd->resp[2] = mci_readl(host, REG_RESP1); - mrq->cmd->resp[3] = mci_readl(host, REG_RESP0); - } else { - mrq->cmd->resp[0] = mci_readl(host, REG_RESP0); - } - if (mrq->data) - mrq->data->bytes_xfered = - mrq->data->blocks * mrq->data->blksz; - } - - if (mrq->data) { - struct mmc_data *data = mrq->data; - u32 temp; - - mci_writel(host, REG_IDST, 0x337); - mci_writel(host, REG_DMAC, 0); - temp = mci_readl(host, REG_GCTRL); - mci_writel(host, REG_GCTRL, temp|SDXC_DMAReset); - temp &= ~SDXC_DMAEnb; - mci_writel(host, REG_GCTRL, temp); - temp |= SDXC_FIFOReset; - mci_writel(host, REG_GCTRL, temp); - dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, - sunxi_mmc_get_dma_dir(data)); - } - - mci_writel(host, REG_RINTR, 0xffff); - - dev_dbg(mmc_dev(host->mmc), "req done, resp %08x %08x %08x %08x\n", - mrq->cmd->resp[0], mrq->cmd->resp[1], - mrq->cmd->resp[2], mrq->cmd->resp[3]); - - host->mrq = NULL; - host->int_sum = 0; - host->wait_dma = 0; - - spin_unlock_irqrestore(&host->lock, iflags); - - if (mrq->data && mrq->data->error) { - dev_err(mmc_dev(host->mmc), - "data error, sending stop command\n"); - sunxi_mmc_send_manual_stop(host, mrq); - } - - mmc_request_done(host->mmc, mrq); -} - -static s32 sunxi_mmc_get_ro(struct mmc_host *mmc) -{ - struct sunxi_mmc_host *host = mmc_priv(mmc); - - int read_only = 0; - - if (gpio_is_valid(host->wp_pin)) { - pinctrl_request_gpio(host->wp_pin); - read_only = gpio_get_value(host->wp_pin); - } - - return read_only; -} - -static irqreturn_t sunxi_mmc_irq(int irq, void *dev_id) -{ - struct sunxi_mmc_host *host = dev_id; - u32 finalize = 0; - u32 sdio_int = 0; - u32 msk_int; - u32 idma_int; - - spin_lock(&host->lock); - - idma_int = mci_readl(host, REG_IDST); - msk_int = mci_readl(host, REG_MISTA); - - dev_dbg(mmc_dev(host->mmc), "irq: rq %p mi %08x idi %08x\n", - host->mrq, msk_int, idma_int); - - if (host->mrq) { - if (idma_int & SDXC_IDMACReceiveInt) - host->wait_dma = 0; - - host->int_sum |= msk_int; - - /* Wait for CmdDone on RespTimeout before finishing the req */ - if ((host->int_sum & SDXC_RespTimeout) && - !(host->int_sum & SDXC_CmdDone)) - mci_writel(host, REG_IMASK, - host->sdio_imask | SDXC_CmdDone); - else if (host->int_sum & SDXC_IntErrBit) - finalize = 1; /* Don't wait for dma on error */ - else if (host->int_sum & SDXC_IntDoneBit && !host->wait_dma) - finalize = 1; /* Done */ - - if (finalize) { - mci_writel(host, REG_IMASK, host->sdio_imask); - mci_writel(host, REG_IDIE, 0); - } - } - - if (msk_int & SDXC_SDIOInt) - sdio_int = 1; - - mci_writel(host, REG_RINTR, msk_int); - mci_writel(host, REG_IDST, idma_int); - - spin_unlock(&host->lock); - - if (finalize) - tasklet_schedule(&host->tasklet); - - if (sdio_int) - mmc_signal_sdio_irq(host->mmc); - - return IRQ_HANDLED; -} - -static void sunxi_mmc_tasklet(unsigned long data) -{ - struct sunxi_mmc_host *smc_host = (struct sunxi_mmc_host *) data; - sunxi_mmc_finalize_request(smc_host); -} - -static void sunxi_mmc_oclk_onoff(struct sunxi_mmc_host *host, u32 oclk_en) -{ - unsigned long expire = jiffies + msecs_to_jiffies(2000); - u32 rval; - - rval = mci_readl(host, REG_CLKCR); - rval &= ~(SDXC_CardClkOn | SDXC_LowPowerOn); - if (oclk_en) - rval |= SDXC_CardClkOn; - if (!host->io_flag) - rval |= SDXC_LowPowerOn; - mci_writel(host, REG_CLKCR, rval); - - rval = SDXC_Start | SDXC_UPCLKOnly | SDXC_WaitPreOver; - if (host->voltage_switching) - rval |= SDXC_VolSwitch; - mci_writel(host, REG_CMDR, rval); - do { - rval = mci_readl(host, REG_CMDR); - } while (time_before(jiffies, expire) && (rval & SDXC_Start)); - - if (rval & SDXC_Start) { - dev_err(mmc_dev(host->mmc), "fatal err update clk timeout\n"); - host->ferror = 1; - } -} - -static void sunxi_mmc_set_clk_dly(struct sunxi_mmc_host *smc_host, - u32 oclk_dly, u32 sclk_dly) -{ - unsigned long iflags; - struct clk_hw *hw = __clk_get_hw(smc_host->clk_mod); - - spin_lock_irqsave(&smc_host->lock, iflags); - clk_sunxi_mmc_phase_control(hw, sclk_dly, oclk_dly); - spin_unlock_irqrestore(&smc_host->lock, iflags); -} - -struct sunxi_mmc_clk_dly mmc_clk_dly[MMC_CLK_MOD_NUM] = { - { MMC_CLK_400K, 0, 7 }, - { MMC_CLK_25M, 0, 5 }, - { MMC_CLK_50M, 3, 5 }, - { MMC_CLK_50MDDR, 2, 4 }, - { MMC_CLK_50MDDR_8BIT, 2, 4 }, - { MMC_CLK_100M, 1, 4 }, - { MMC_CLK_200M, 1, 4 }, -}; - -static void sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *smc_host, - unsigned int rate) -{ - u32 newrate; - u32 src_clk; - u32 oclk_dly; - u32 sclk_dly; - u32 temp; - struct sunxi_mmc_clk_dly *dly = NULL; - - newrate = clk_round_rate(smc_host->clk_mod, rate); - if (smc_host->clk_mod_rate == newrate) { - dev_dbg(mmc_dev(smc_host->mmc), "clk already %d, rounded %d\n", - rate, newrate); - return; - } - - dev_dbg(mmc_dev(smc_host->mmc), "setting clk to %d, rounded %d\n", - rate, newrate); - - /* setting clock rate */ - clk_disable(smc_host->clk_mod); - clk_set_rate(smc_host->clk_mod, newrate); - clk_enable(smc_host->clk_mod); - smc_host->clk_mod_rate = newrate = clk_get_rate(smc_host->clk_mod); - dev_dbg(mmc_dev(smc_host->mmc), "clk is now %d\n", newrate); - - sunxi_mmc_oclk_onoff(smc_host, 0); - /* clear internal divider */ - temp = mci_readl(smc_host, REG_CLKCR); - temp &= ~0xff; - mci_writel(smc_host, REG_CLKCR, temp); - - /* determine delays */ - if (rate <= 400000) { - dly = &mmc_clk_dly[MMC_CLK_400K]; - } else if (rate <= 25000000) { - dly = &mmc_clk_dly[MMC_CLK_25M]; - } else if (rate <= 50000000) { - if (smc_host->ddr) { - if (smc_host->bus_width == 8) - dly = &mmc_clk_dly[MMC_CLK_50MDDR_8BIT]; - else - dly = &mmc_clk_dly[MMC_CLK_50MDDR]; - } else { - dly = &mmc_clk_dly[MMC_CLK_50M]; - } - } else if (rate <= 104000000) { - dly = &mmc_clk_dly[MMC_CLK_100M]; - } else if (rate <= 208000000) { - dly = &mmc_clk_dly[MMC_CLK_200M]; - } else - dly = &mmc_clk_dly[MMC_CLK_50M]; - - oclk_dly = dly->oclk_dly; - sclk_dly = dly->sclk_dly; - - src_clk = clk_get_rate(clk_get_parent(smc_host->clk_mod)); - if (src_clk >= 300000000 && src_clk <= 400000000) { - if (oclk_dly) - oclk_dly--; - if (sclk_dly) - sclk_dly--; - } - - sunxi_mmc_set_clk_dly(smc_host, oclk_dly, sclk_dly); - sunxi_mmc_oclk_onoff(smc_host, 1); - - /* oclk_onoff sets various irq status bits, clear these */ - mci_writel(smc_host, REG_RINTR, - mci_readl(smc_host, REG_RINTR) & ~SDXC_SDIOInt); -} - -static void sunxi_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) -{ - struct sunxi_mmc_host *host = mmc_priv(mmc); - u32 temp; - s32 err; - - /* Set the power state */ - switch (ios->power_mode) { - case MMC_POWER_ON: - break; - - case MMC_POWER_UP: - if (!IS_ERR(host->vmmc)) { - mmc_regulator_set_ocr(host->mmc, host->vmmc, ios->vdd); - udelay(200); - } - - err = clk_prepare_enable(host->clk_ahb); - if (err) { - dev_err(mmc_dev(host->mmc), "AHB clk err %d\n", err); - host->ferror = 1; - return; - } - err = clk_prepare_enable(host->clk_mod); - if (err) { - dev_err(mmc_dev(host->mmc), "MOD clk err %d\n", err); - host->ferror = 1; - return; - } - - sunxi_mmc_init_host(mmc); - enable_irq(host->irq); - - dev_dbg(mmc_dev(host->mmc), "power on!\n"); - host->ferror = 0; - break; - - case MMC_POWER_OFF: - dev_dbg(mmc_dev(host->mmc), "power off!\n"); - disable_irq(host->irq); - sunxi_mmc_exit_host(host); - clk_disable_unprepare(host->clk_ahb); - clk_disable_unprepare(host->clk_mod); - if (!IS_ERR(host->vmmc)) - mmc_regulator_set_ocr(host->mmc, host->vmmc, 0); - host->ferror = 0; - break; - } - - /* set bus width */ - switch (ios->bus_width) { - case MMC_BUS_WIDTH_1: - mci_writel(host, REG_WIDTH, SDXC_WIDTH1); - host->bus_width = 1; - break; - case MMC_BUS_WIDTH_4: - mci_writel(host, REG_WIDTH, SDXC_WIDTH4); - host->bus_width = 4; - break; - case MMC_BUS_WIDTH_8: - mci_writel(host, REG_WIDTH, SDXC_WIDTH8); - host->bus_width = 8; - break; - } - - /* set ddr mode */ - temp = mci_readl(host, REG_GCTRL); - if (ios->timing == MMC_TIMING_UHS_DDR50) { - temp |= SDXC_DDR_MODE; - host->ddr = 1; - } else { - temp &= ~SDXC_DDR_MODE; - host->ddr = 0; - } - mci_writel(host, REG_GCTRL, temp); - - /* set up clock */ - if (ios->clock && ios->power_mode) { - dev_dbg(mmc_dev(host->mmc), "ios->clock: %d\n", ios->clock); - sunxi_mmc_clk_set_rate(host, ios->clock); - usleep_range(50000, 55000); - } -} - -static void sunxi_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) -{ - struct sunxi_mmc_host *smc_host = mmc_priv(mmc); - unsigned long flags; - u32 imask; - - spin_lock_irqsave(&smc_host->lock, flags); - imask = mci_readl(smc_host, REG_IMASK); - if (enable) { - smc_host->sdio_imask = SDXC_SDIOInt; - imask |= SDXC_SDIOInt; - } else { - smc_host->sdio_imask = 0; - imask &= ~SDXC_SDIOInt; - } - mci_writel(smc_host, REG_IMASK, imask); - spin_unlock_irqrestore(&smc_host->lock, flags); -} - -static void sunxi_mmc_hw_reset(struct mmc_host *mmc) -{ - struct sunxi_mmc_host *smc_host = mmc_priv(mmc); - mci_writel(smc_host, REG_HWRST, 0); - udelay(10); - mci_writel(smc_host, REG_HWRST, 1); - udelay(300); -} - -static int sunxi_mmc_card_present(struct mmc_host *mmc) -{ - struct sunxi_mmc_host *host = mmc_priv(mmc); - - switch (host->cd_mode) { - case CARD_DETECT_BY_GPIO_POLL: - return !gpio_get_value(host->cd_pin); /* Signal inverted */ - case CARD_ALWAYS_PRESENT: - return 1; - } - return 0; /* Never reached */ -} - -static void sunxi_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) -{ - struct sunxi_mmc_host *host = mmc_priv(mmc); - struct mmc_command *cmd = mrq->cmd; - struct mmc_data *data = mrq->data; - unsigned long iflags; - u32 imask = SDXC_IntErrBit; - u32 cmd_val = SDXC_Start | (cmd->opcode & 0x3f); - u32 byte_cnt = 0; - int ret; - - if (!sunxi_mmc_card_present(mmc) || host->ferror) { - dev_dbg(mmc_dev(host->mmc), "no medium present\n"); - mrq->cmd->error = -ENOMEDIUM; - mmc_request_done(mmc, mrq); - return; - } - - if (data) { - byte_cnt = data->blksz * data->blocks; - mci_writel(host, REG_BLKSZ, data->blksz); - mci_writel(host, REG_BCNTR, byte_cnt); - ret = sunxi_mmc_prepare_dma(host, data); - if (ret < 0) { - dev_err(mmc_dev(host->mmc), "prepare DMA failed\n"); - cmd->error = ret; - cmd->data->error = ret; - mmc_request_done(host->mmc, mrq); - return; - } - } - - if (cmd->opcode == MMC_GO_IDLE_STATE) { - cmd_val |= SDXC_SendInitSeq; - imask |= SDXC_CmdDone; - } - - if (cmd->opcode == SD_SWITCH_VOLTAGE) { - cmd_val |= SDXC_VolSwitch; - imask |= SDXC_VolChgDone; - host->voltage_switching = 1; - sunxi_mmc_oclk_onoff(host, 1); - } - - if (cmd->flags & MMC_RSP_PRESENT) { - cmd_val |= SDXC_RspExp; - if (cmd->flags & MMC_RSP_136) - cmd_val |= SDXC_LongRsp; - if (cmd->flags & MMC_RSP_CRC) - cmd_val |= SDXC_CheckRspCRC; - - if ((cmd->flags & MMC_CMD_MASK) == MMC_CMD_ADTC) { - cmd_val |= SDXC_DataExp | SDXC_WaitPreOver; - if (cmd->data->flags & MMC_DATA_STREAM) { - imask |= SDXC_AutoCMDDone; - cmd_val |= SDXC_Seqmod | SDXC_SendAutoStop; - } - if (cmd->data->stop) { - imask |= SDXC_AutoCMDDone; - cmd_val |= SDXC_SendAutoStop; - } else - imask |= SDXC_DataOver; - - if (cmd->data->flags & MMC_DATA_WRITE) - cmd_val |= SDXC_Write; - else - host->wait_dma = 1; - } else - imask |= SDXC_CmdDone; - } else - imask |= SDXC_CmdDone; - - dev_dbg(mmc_dev(host->mmc), "cmd %d(%08x) arg %x ie 0x%08x len %d\n", - cmd_val & 0x3f, cmd_val, cmd->arg, imask, - mrq->data ? mrq->data->blksz * mrq->data->blocks : 0); - - spin_lock_irqsave(&host->lock, iflags); - host->mrq = mrq; - mci_writel(host, REG_IMASK, host->sdio_imask | imask); - spin_unlock_irqrestore(&host->lock, iflags); - - mci_writel(host, REG_CARG, cmd->arg); - mci_writel(host, REG_CMDR, cmd_val); -} - -static const struct of_device_id sunxi_mmc_of_match[] = { - { .compatible = "allwinner,sun4i-mmc", }, - { .compatible = "allwinner,sun5i-mmc", }, - { /* sentinel */ } -}; -MODULE_DEVICE_TABLE(of, sunxi_mmc_of_match); - -static struct mmc_host_ops sunxi_mmc_ops = { - .request = sunxi_mmc_request, - .set_ios = sunxi_mmc_set_ios, - .get_ro = sunxi_mmc_get_ro, - .get_cd = sunxi_mmc_card_present, - .enable_sdio_irq = sunxi_mmc_enable_sdio_irq, - .hw_reset = sunxi_mmc_hw_reset, -}; - -static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host, - struct platform_device *pdev) -{ - struct device_node *np = pdev->dev.of_node; - int ret; - - if (of_device_is_compatible(np, "allwinner,sun4i-mmc")) - host->idma_des_size_bits = 13; - else - host->idma_des_size_bits = 16; - - host->vmmc = devm_regulator_get_optional(&pdev->dev, "vmmc"); - if (IS_ERR(host->vmmc) && PTR_ERR(host->vmmc) == -EPROBE_DEFER) - return -EPROBE_DEFER; - - host->reg_base = devm_ioremap_resource(&pdev->dev, - platform_get_resource(pdev, IORESOURCE_MEM, 0)); - if (IS_ERR(host->reg_base)) - return PTR_ERR(host->reg_base); - - host->irq = platform_get_irq(pdev, 0); - ret = devm_request_irq(&pdev->dev, host->irq, sunxi_mmc_irq, 0, - "sunxi-mci", host); - if (ret) - return ret; - disable_irq(host->irq); - - host->clk_ahb = devm_clk_get(&pdev->dev, "ahb"); - if (IS_ERR(host->clk_ahb)) { - dev_err(&pdev->dev, "Could not get ahb clock\n"); - return PTR_ERR(host->clk_ahb); - } - - host->clk_mod = devm_clk_get(&pdev->dev, "mod"); - if (IS_ERR(host->clk_mod)) { - dev_err(&pdev->dev, "Could not get mod clock\n"); - return PTR_ERR(host->clk_mod); - } - - of_property_read_u32(np, "bus-width", &host->bus_width); - if (host->bus_width != 1 && host->bus_width != 4) { - dev_err(&pdev->dev, "Invalid bus-width %d\n", host->bus_width); - return -EINVAL; - } - - of_property_read_u32(np, "cd-mode", &host->cd_mode); - switch (host->cd_mode) { - case CARD_DETECT_BY_GPIO_POLL: - host->cd_pin = of_get_named_gpio(np, "cd-gpios", 0); - if (!gpio_is_valid(host->cd_pin)) { - dev_err(&pdev->dev, "Invalid cd-gpios\n"); - return -EINVAL; - } - ret = devm_gpio_request(&pdev->dev, host->cd_pin, "mmc_cd"); - if (ret) { - dev_err(&pdev->dev, "Could not get cd-gpios\n"); - return ret; - } - gpio_direction_input(host->cd_pin); - break; - case CARD_ALWAYS_PRESENT: - break; - default: - dev_err(&pdev->dev, "Invalid cd-mode %d\n", host->cd_mode); - return -EINVAL; - } - - host->wp_pin = of_get_named_gpio(np, "wp-gpios", 0); - if (gpio_is_valid(host->wp_pin)) { - ret = devm_gpio_request(&pdev->dev, host->wp_pin, "mmc_wp"); - if (ret) { - dev_err(&pdev->dev, "Could not get wp-gpios\n"); - return ret; - } - gpio_direction_input(host->wp_pin); - } - - return 0; -} - -static int sunxi_mmc_probe(struct platform_device *pdev) -{ - struct sunxi_mmc_host *host; - struct mmc_host *mmc; - int ret; - - mmc = mmc_alloc_host(sizeof(struct sunxi_mmc_host), &pdev->dev); - if (!mmc) { - dev_err(&pdev->dev, "mmc alloc host failed\n"); - return -ENOMEM; - } - - host = mmc_priv(mmc); - host->mmc = mmc; - spin_lock_init(&host->lock); - tasklet_init(&host->tasklet, sunxi_mmc_tasklet, (unsigned long)host); - - ret = sunxi_mmc_resource_request(host, pdev); - if (ret) - goto error_free_host; - - host->sg_cpu = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, - &host->sg_dma, GFP_KERNEL); - if (!host->sg_cpu) { - dev_err(&pdev->dev, "Failed to allocate DMA descriptor mem\n"); - ret = -ENOMEM; - goto error_free_host; - } - - mmc->ops = &sunxi_mmc_ops; - mmc->max_blk_count = 8192; - mmc->max_blk_size = 4096; - mmc->max_segs = PAGE_SIZE / sizeof(struct sunxi_idma_des); - mmc->max_seg_size = (1 << host->idma_des_size_bits); - mmc->max_req_size = mmc->max_seg_size * mmc->max_segs; - /* 400kHz ~ 50MHz */ - mmc->f_min = 400000; - mmc->f_max = 50000000; - /* available voltages */ - if (!IS_ERR(host->vmmc)) - mmc->ocr_avail = mmc_regulator_get_ocrmask(host->vmmc); - else - mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; - - mmc->caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED | - MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_UHS_SDR50 | - MMC_CAP_UHS_DDR50 | MMC_CAP_SDIO_IRQ | MMC_CAP_NEEDS_POLL | - MMC_CAP_DRIVER_TYPE_A; - if (host->bus_width == 4) - mmc->caps |= MMC_CAP_4_BIT_DATA; - mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP; - - ret = mmc_add_host(mmc); - if (ret) - goto error_free_dma; - - dev_info(&pdev->dev, "base:0x%p irq:%u\n", host->reg_base, host->irq); - platform_set_drvdata(pdev, mmc); - return 0; - -error_free_dma: - dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); -error_free_host: - mmc_free_host(mmc); - return ret; -} - -static int sunxi_mmc_remove(struct platform_device *pdev) -{ - struct mmc_host *mmc = platform_get_drvdata(pdev); - struct sunxi_mmc_host *host = mmc_priv(mmc); - - mmc_remove_host(mmc); - sunxi_mmc_exit_host(host); - tasklet_disable(&host->tasklet); - dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); - mmc_free_host(mmc); - - return 0; -} - -static struct platform_driver sunxi_mmc_driver = { - .driver = { - .name = "sunxi-mci", - .owner = THIS_MODULE, - .of_match_table = of_match_ptr(sunxi_mmc_of_match), - }, - .probe = sunxi_mmc_probe, - .remove = sunxi_mmc_remove, -}; -module_platform_driver(sunxi_mmc_driver); - -MODULE_DESCRIPTION("Allwinner's SD/MMC Card Controller Driver"); -MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("David Lanzendörfer <david.lanzendoerfer@o2s.ch>"); -MODULE_ALIAS("platform:sunxi-mmc"); |